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Background <p>Sialidosis is an autosomal recessive hereditary disease characterized by the mutation of neuraminidase-1 (<i>NEU1</i>) gene, resulting in decreased activity of α-N-acetylneuraminidase. This leads to metabolic abnormalities in various organs. Sialidosis is classified into two distinct clinical phenotypes, type I and type II, based on the age of onset and severity of clinical manifestations.</p> Case presentation <p>Here, we report a case involving a patient and his two sisters, all of whom showed seizures and ataxia during adolescence, with progressively worsening symptoms. Prior to admission, none of the patients had received a systemic diagnosis or treatment. The whole exome sequencing identified a homozygous <i>NEU1</i> mutation (NM_000434.3:c.544A &gt; G [p.Ser182Gly]) in all three siblings. Their parents and children, who were asymptomatic, were found to be heterozygous carriers. The three patients were ultimately diagnosed with type I sialidosis and treated with antiseizure medications, but they continued to experience recurrent seizures.</p> Conclusions <p>This case report enhances our understanding of sialidosis, particularly in patients presenting with seizures and ataxia. Furthermore, the gene sequencing is a crucial tool for confirming the diagnosis of sialidosis and provides a valuable approach for genetic counseling in affected families.</p>

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Type I Sialidosis in a Chinese family: a case report and literature review

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年6月4日

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  • Xia Zhou,
  • Shengyou Su,
  • Shenghua Li,
  • ZuFang Yi,
  • Liling Feng,
  • Junyi Chen,
  • Binglin Fan

摘要

Background

Sialidosis is an autosomal recessive hereditary disease characterized by the mutation of neuraminidase-1 (NEU1) gene, resulting in decreased activity of α-N-acetylneuraminidase. This leads to metabolic abnormalities in various organs. Sialidosis is classified into two distinct clinical phenotypes, type I and type II, based on the age of onset and severity of clinical manifestations.

Case presentation

Here, we report a case involving a patient and his two sisters, all of whom showed seizures and ataxia during adolescence, with progressively worsening symptoms. Prior to admission, none of the patients had received a systemic diagnosis or treatment. The whole exome sequencing identified a homozygous NEU1 mutation (NM_000434.3:c.544A > G [p.Ser182Gly]) in all three siblings. Their parents and children, who were asymptomatic, were found to be heterozygous carriers. The three patients were ultimately diagnosed with type I sialidosis and treated with antiseizure medications, but they continued to experience recurrent seizures.

Conclusions

This case report enhances our understanding of sialidosis, particularly in patients presenting with seizures and ataxia. Furthermore, the gene sequencing is a crucial tool for confirming the diagnosis of sialidosis and provides a valuable approach for genetic counseling in affected families.